When a five year old child has watery discharge, it is more likely to be considered as diarrhea caused by poor diet, eating unclean food, or intestinal viral infection. In terms of treatment, since the child is already five years old, there is no need to be too nervous. Observe whether the child has any symptoms of infection or poisoning, such as fever, poor spirit and vomiting. If there are symptoms of infection or poisoning, you should take your child to the pediatric emergency department of the hospital for consultation and examination. If there are no symptoms of infection or poisoning, you can take oral medication at home to prevent and correct dehydration by taking hypotonic oral rehydration salts, and montelukast on an empty stomach to stop diarrhea. You can also take probiotics, such as Saccharomyces boulardii, to regulate gastrointestinal function. It is also important to do a good job of managing the diet of a five-year-old child, because diarrhea is poor digestion and absorption, so you should avoid the intake of indigestible, as well as greasy, stimulating foods, and you should also eat small, frequent meals.